I am shocked, I tell you, shocked

Der Spiegel reports that "the United Nations special tribunal investigating the murder of former Lebanese Prime Minister Rafik al-Hariri has reached surprising new conclusions". The article goes through the various theories that have sprung up around Rafik's assassination, some more likely than others, though the Knights Templar seem to be missing from the list.

Then it comes to the point:

But now there are signs that the investigation has yielded new and explosive results. SPIEGEL has learned from sources close to the tribunal and verified by examining internal documents, that the Hariri case is about to take a sensational turn. Intensive investigations in Lebanon are all pointing to a new conclusion: that it was not the Syrians, but instead special forces of the Lebanese Shiite organization Hezbollah ("Party of God") that planned and executed the diabolical attack. Tribunal chief prosecutor Bellemare and his judges apparently want to hold back this information, of which they been aware for about a month. What are they afraid of?

I rather like that sly use of the word "explosive" but the rest of the paragraph is a little strange.

What can those investigators who are about to finger Hezbollah (or not) be afraid of? Not some explosive device, perchance?

In any case, who is actually surprised by the notion that Hezbollah was behind that assassination? And why does that rule out Syria's involvement? Who is behind Hezbollah? Iran and .... yes, that's right, Syria.